Machine for perforating seat-frames



(No Model.) 2 Sheets-Sheet 1.

' J. M. NASH.

MACHINE FOR PERFORATING SEAT FRAMES. No. 363,164 Patented May 17, 1887.

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(No Model.) 2 SheetsSheet 2.

' J. M. NASH.

MACHINE FOR PERPORATING SEAT PRAIVIES. No. 363,164.

Patented May 17, 1887.

W/fnassas ilNITED STATES PATENT trier.

JOHN M. NASH, OF HUD SON, VISOONSIN.

MACHINE FOR PERFORATING SEAT-FRAMES.

SPECIFICATION forming part of Letters Patent No. 363,164, dated May 17,1887.

Application filed Oclober 25,1886. Serial No. 217,094. (No model.) 7

To all whom it may concern.-

Beitknown that I, JOHN M. NASH, of Hudson, in the county of of St. Groix, and in the State of YVisconsin, have invented certain new and useful Improvements in Machines for Perforating Seat-Frames, &c.; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to machines for perfo rating the seat-frames or seats of chairs; and it consists in certain peculiarities of constructionand combination of parts, as will be hereinafter described with reference to the accompanying drawings, and subsequently claimed.

In the drawings, Figure 1 represents a perspective view of myinvention; Fig. 2,a partial front elevation showing the table-actuating mechanism in detail; Fig. 3, a horizontal sec tion on line as :r, Fig. 2; Fig. 4, an under side view of the table; Fig. 5, a detail vertical sec-' tion of the friction-sleeve, showing the toolspindle in elevation; Fig. 6, an edge view of the crank-disk, and Fig. 7 a plan viewofa ehairseat frame after having been operated upon by my machine.

Referring by letter to the drawings, A represents the frame of my machine, having bear iugs for a main shaft, B, the latter having keyed thereto a driving-pulley, 0, designed to be operatively connected with any suitable power. The main shaft B is also provided with a pulley, D, that is connected by means of a belt, E, with a pulley, F, on a shaft, G, the latter having its bearings in the upper part of the frame A.

The shaft G carries on its inner end a frietion-disk, H, arranged to come in contact with the enlarged conical end a of a vertical sleeve, I, and a setscrew, b, is arranged to impinge against the outer end of said shaft to horizontally adjust the latter, in order to compensate for wear on the friction-disk and hold the same up to its work.

The sleeveI surrounds a spindle, J, that carries the boringtool K, and this sleeve is provided with an internal recess or slot, 0, that engages a pin, (1, on the spindle, in order that both parts may revolve together and at the same time permit the necessary vertical play of said spindle.

The upper end of the spindle J" is connected,

by means of a link, 6, with a horizontal arm, L, that is pivotally connected to a stem, f, upwardly extended from the frame A, and a rod, 9, unites the horizontal arm with a bellcrank lever, M, fulerumed at h to said frame.

The bell-crank lever M has the outer end of its horizontal arm provided'with a slot, i,that engages a stud, 7r, on a J -bolt, m, that is ad justable in a disk, N, keyed to one end of a shaft, 0, the latter having a bearing in the frame, A, and carrying on, its end opposite the disk a pulley, P, that. is connected by a belt, Q. with the main shaft 13.

The vertical arm of the bell-crank lever M is arranged to actuate a traveler, 1?, an arm, n, of which operates in a bearing, a, that forms part of or is secured to the frame A, the pivotal member It of said traveler being pro vided with a spring-pawl, 0, that actuates a circular ratchet-plate, S, this latter part having a depending flange, p, that conforms in sh ape to the seat-framc orseat to be perforated. The pivotal member It of the traveler is also provided with a pin, m, that engages an annular groove, m on the under side of the ratehet-plate; or, if found more desirable, a

flange may be substituted for said groove and two pins be placed on said part It to engage such flange.

The ratchet-plate S is provided with key hole slots q, that engage screws r,by which said plate is detachably secured to a cross-shaped frame, T, to form what I term the table, and the arms of said frame are provided with slots 8, that serve as guides for clamp-blocks U, these latter parts operating to retain the seatframe or seat in position to be acted upon by the boring-tool K, and a pressure-foot V, pivotally connected to the frame A,is designed to prevent the seat-frame or seat from binding on said boring-tool when the latter is on its return after making a perforation.

I may substitute a circulanplate for the cross shaped frame T 5 but for some reasons the latter is to be preferred, and is therefore illustrated and more particularly described.

A hub, 25, on the cross-shaped framed, engages a pin a on an automatic sliding plate W, that operates in a corresponding groove, '0, in a lateral extension, A, of the frame A, and secured to this sliding plate is an arm, 20, that has pivotally secured thereto a spring pawl, w, arranged to engage the ratchet-teeth on the plate S in opposition to the pawl 0 on the traveler R, thus forming astop to prevent reverse movement of the table formed by said cross-shaped frame and ratchet-plate.

The depending flange p of the ratchet-plate S is arranged to come between two pins, 19, on the lateral extension A of the frame A; or, if found more desirable, I may omit the flange and substitute therefor a groove that would engage a single-one of said pins. I

One of the arms of the crossshaped frame is provided with a lug, 3 that is arranged to come in contact with a pin, 1, upwardly projecting from the free end of an arm, y, that is pivotally secured to a rack-plate, A 011 the outer end and at right angles to the extension A of the frame A.

The rack-plate serves to engage the leverarm Z of a tightener, Z, for the belt Q, this tightener having its bearings in a hanger, z, depending from said rackplate and a box, z, on the frame A. The outer end of the rackplate is turned down and out to form a stop, z, that limits the movement of the lever-arm Z when the latter is disengaged from said raclrplate, this operation being automatically accomplished by the impingment of the lug y on the frame T against the pin 3 on the free end of the arm Y.

The groove or flange p on the ratchet-plate S may be either square, round, or of irregular form, according to the pattern of the seatframe or seat, or the design to be made by the perforations, and said plate is therefore made detachable from the clamping plate or frame T, in order that one such ratchet-plate may be substituted for another, according to the class of work to be performed.

I11 the operation of my invention the seatframe or seat to be perforated is clamped on the circular table composed of the detachablyunited parts S T, the lug y on the clamp-frame being just past the pin 7 on the arm Y, pivoted to the rack-plate A The lever-arm Z is now engaged with the rack-plate to tighten and hold the belt Q against the main shaft B. The sleeve I is continuously revolved by the friction-disk H, and the spindle J, that carries the boring-tool K, being secured to said sleeve in the manner above describe'dfis accordingly carried therewith. The stud k on the adj ustable plate that forms part of the disk N being engaged with the slot 43 in the bell-crank lever M,-the latter is actuated, and by its rod-connection 9 causes thearm L to be alternately depressed and elevated, thus vertically operating the spindle J to cause the boring-tool K to perform its function. When the tool it is boring one perforation, the pawl w is engaged with the ratchet-plate S to hold the table (of which this plate forms a part) stationary in the desired position, while at the same time the vertical arm of the bell-crank M actuates the traveler R to carry the pawl 0 back to engage another ratchet-tooth, this engagement taking placejust as said boring-tool leaves the wood after having completed the perforation. As the boring-tool is carried up, the vertical arm of the bell-crank lever moves the traveler R in an opposite direction to that above described, and thus the pawl 0 operates to move the table one step to bring an in perforate part of the seat-frame or seat in line with said tool, and the abovedescribed operation is continued until the lug g on the clamp-frame T comes in contact with the pin 11 on the pivoted arm Y to disengage the lever-arm Zf from the rackplate A, and thus loosen the'belt Q to stop the mechanism that vertically operates the spindle J and simultaneously actuates the ratchetplate S. The circular table having made one entire revolution, the requisite number of perforations are made and such work on the seatframe or seat, clamped to said table, completed. The seat-frame or seat is now removed from the table and another one clamped thereon and the operationvabove described repeated, the number of perforations in each article being equal to the number of teeth on the ratchetplate, and the slidingplate m in the disk N is adj nsted to time the movement of the boringtool to accord with the distance between the ratchet-teeth. When theratchetplate S is acted upon by the pawl 0, the groom or flange p.011 the under side of this plate is guided by the pin or pins 1), and thus the perforations in the seat-frame or seat form a contour corresponding to that of said groove or flange, while at the same time the pin or'pins m on the pivotal member R of the traveler are engaged by the flange or groove m also 011 the under side of the plate, in order to automatically bring said pawl into successive engagement with the several ratchet-teeth as the work proceeds, irrespective of the movement of the table that carries such seat-frame or seat.

I have shown the ratchet-plate in the present instance as provided with a depending flange of irregular form, it being the pattern ofa seat-frame for a chair designed to be caned, and the ratchet-teeth on said plate are'of such number and distance apart as to give the requisite amount or" perforations necessary for the operation of caning.

The present ratchet-plate may be readily replaced by another having a different-shaped groove or flange that corresponds with some other form of seat-frame, or'with some design to be made by perforations in chair-seats of the kind generally constructed by gluing and pressing together thin layers of wood, this style of chair-seat being too well known to require further description.

A machine such as-I have described will be found to save a vast amount of time and labor over the methods ordinarily employed for perforating seat-frames and seats, and said machine, being mainly automatic in its action, requires but little attention, while by its use a single operative can perforate-suchtarticles in a very rapid manner without having to do more than remove each of said seat-frames or seats from the circular rotating table when perforated, place animperforate one inposition to be acted upon, and tighten the belt that, through suitable mechanism, communicates motion to said table and the boring-tool.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of a suitable main frame, a ratchet toothed clamping table loosely mounted thereon, a boring-tool the spindle of which has bearings in the main frame and is provided with a pin,a recessed or slotted sleeve surrounding the spindle and having one of its ends provided with a conical enlargement, a friction-disk arranged to comein contact with the conical end of the spindle, a horizontal arm pivoted to the main frame and linked to said spindle, a bell-crank lever fulcrumed to said main frame and connected to the hori zontal arm, a traveler connected to the lever and provided with a pawl to engage the teeth on the table, a crank-disk operatively connected to said lever, and means for actuating the friction-disk and crank-disk, substantially as and for the purpose set forth.

2. The combination ofa suitable main frame, a table loosely mounted on the frame and having ratchet-teeth on its periphery, its under side provided with an annular groove or its equivalent, and a depending flange or equivalent thereof, having any desired contour, a traveler provided with a pawl to engage the ratchet-teeth on said table, pins respectively arranged on the traveler and the main frame to engage said groove and flange, a boringtool having a reciprocating spindle that has its hearings in said frame, and a mechanism, substantially as described, for simultaneously driving the boring-tool and actuating the trav eler, as set forth.

3. The combination of a table, comprising a circular ratchet -plate provided upon its under side with an annular groove or its equivalent, and a depending flange or equivalent thereof, having any desired contour, and a clampingframe detachably united to said plate, a main frame having an extension thereof provided with a sliding plate, to which the table is loosely journaled, and a pin or pins that engage the depending flange or its equivalent, a stationary pawl that engages the teeth of the ratchet-plate, a traveler having an arm thereof operative in the main frame and a pivotal member provided with a pawl that also engages the teeth on said ratchet-plate, and a pin or pins arranged to engage the annular groove or its equivalent in this latter plate, a boring tool provided with a reciprocating spindle operative in said main frame, and a mechanism, substantially as described, for simultaneously driving the boring-tool and intermittentl y actuating the traveler, as set forth. 4. The combination of asuitablc main frame having a lateral extension provided with a pin or pins, a sliding plate operative in said framemember carrying a pawl that engages said ratehetteeth, and a pin or pins arranged to engage the annular groove or its equivalent in the table, a boringtool the spindle of which has hearings in the main frame and is provided with a pin, a sleeve surrounding the spindle and having one of its ends provided with a conical enlargement and a recess or slot in its body portion to engage the spind1epin, a friction-disk arranged to come in contact with the conical end of the spindle, a horizontal arm pivoted to the main frame and togg'led to said spindle, a bell crank lever fulcrunied to said main frame, connected to the horizontal arm and arranged to actuate the traveler, acrankdisk operatively connected to said lever, and means for actuating the friction and crank disks, substantially as and for the purpose set forth.

, 5. The combination of a suitable mainframe, a drive-shaft, an auxiliary shaft carrying a friction-disk, and a similar shaft carrying a crank-disk, all of said shafts being mounted in the frame and the last two independently connected with the main one by suitable belts and pulleys, a sleeve mounted in said main frame and provided at one end with a conical enlargement that comes in contact with the friction-disk, aboriug-tool having its spindle fitted to the sleeve to revolve therewith and have vertical play therein, a horizontal arm pivoted to the main frame and toggled to the spindle, a bellcrank lever fulcrumed to the main frame and operatively connected to the crank-disk and horizontal arm, a clamping-table loosely mountedon the frame and having its periphery provided with a lug and ratchet-teeth, a pawl mechanism actuated by the bell-crank to rotate the table, and a tightener for the belt that transmits motion from the main shaft to the one carrying the crank-disk, said belttightener having a lever-arm that engages a rack-plate on the main frame, and an arm pivotally connected to said frame and provided with a projecting pin that comes in the path of the lug onthe table, substantially as and for thepurpose set forth.

In testimony that I claim the foregoing I have hereunto set my hand, at Milwaukee, in the county of Milwaukee and State of Wisconsin, in the presence of two witnesses.

JOHN M. NASH.

Witnesses: I

H. G. UNDERWOOD, N. E. OLIPHANT.

I IO 

